Science Topics term usage 2007-05-11

This analysis excludes the activity of search-engine spiders, USGS users, and transactions resulting in errors.

(Table shows only the 40 most frequently chosen terms.)

149	river systems
79	geographic information systems (GIS)
58	earthquakes
53	volcanoes
28	acid deposition
24	energy resources
23	stream discharge
22	maps and atlases
20	tectonic processes
18	earthquake occurrences
17	streamflow
17	rocks and deposits
17	earth structure
17	animals
17	sediment transport
16	oil resources
15	hydrology
15	human impacts
14	sedimentation
14	climate change
13	erosion
13	ocean characteristics
13	surface water (non-marine)
13	water use
13	water supply and demand
13	endangered species
12	mineral resources
12	water quality
12	topography
12	contamination and pollution
12	land use and land cover
11	floods
11	global change
10	sea-floor characteristics
10	precipitation (atmospheric)
10	water resources
10	plants (organisms)
10	landslides
10	map coordinate systems
9	marine geology

Science Topics term usage Friday, 2007-05-11